The University of Arizona emeritus professor says in 10 years, humans will cease to exist. Abrupt rises in temperature have us on course for the sixth mass extinction - similar to one that happened about 252 million years ago that culminated in the "great dying".That event was the worst of the mass extinction events in our planet's history and saw all complex life cease, leaving microbes and fungi to rule the planet."I think we are heading for something like that this time around, too," McPherson said."I just don't see how very complex, very complicated organisms that depend upon so many other species, such as humans, I just don't see how we get through that."PS

For those interested in other predictions of apocalyptic events, here is one list: